Groat cutter



June 12, 1928. 1,672,945

T. KlPP, JR

GROAT CUTTER filed March 1925 l qrenror T. Kipp Jr Patented June 12, 1928.

UNITED STATES THEODORE xIrr, Jams wmmrne, MANITOBA; Quins.

GROAT CUTTER.

Appl icattbn filed March26,.192 6 .w Serial No. 97,396.

Theinvention relates to improvements in great cutters and more particularly to that t pe of machine wherein a rotary perforated rum is utilized to receive the groats, and cutting knives are arranged around the periphery of the drum for cutting the greats, and the invention resides more particularly in the knives and the mountings for the same, and an. object of the inventionis to provide a structure which supports both ends of the knives, which is arran ed so that the knives can be simultaneously end shifted and which has the individual knives constructed 'so I that they determine the length of cut of the greats or kernels passing through the drum.

A further Object isto provide a structure which permits ofthe ready substitution of another set of knives where it is desired to increase or shortenthe length of the cut of the groat or kernel. M With the above more important objects in view the. invehtion, consists essentially in the arrangement and construction of parts hereinafter more particularly described, reference being had tothe accompanying drawin i in which: k w v 1 I %ig. 1 is a vertical sectionalviewthrough the. frame of awmachine embodying my invention; and showing the drum, the knives nd the supports for thesamein end elevation. a y i p Fig. 2. is a vertical sectional view at 2 2 Figurel. w y w Fig. 3 is anenlarged detailed vertical sectional view at 33' Figure 2. F'g. 4 is a perspective view ofone of the knives. w

Fig. 5 is an enlarged detailed cross sectional view through a portion of one of the knife holders. y h

Fig. 6 is an enlarged detailed sectional of a portion view. through a portio ofthe drum and" several knives, andshowing in dotted outline twoother typesof knives and how the variation in the angular face of theknives of. the mat or kernel.

In t e drawing like characters of reference indicate corresponding part-sin the several figures.

Theinain frame 1 is substantially rectangular and it is carried by suitable end legs .2. The machine can be built with several perforated drums all mounted on the common driving shaft 3, and with a set of knives next the drum efiec'ts the length of the cut for each drum, and the frame will be made longer or shorter depending on the number of drums and knives used. y

i I have herein shown only two drums and two sets of knives, and the shaft 3 is mounted rotatably in suitable bearings carried by theframe. The drums 4 and 5 Which are hereinshown as arranged in pairs, ea'ch have one end permanently cloi'ed and the other end open, the open ends of the pair of drums being directly opposite one another. The open end of the drum in each instance is closed by a stationary disc like head 6, which telescopes within the drum end and each disc is fitted with outlying lugs .7 and 8,Whl0l1 are supported by a saddle, brid e or cross bar 9 carried by the frame. Tie

bridge is downn ardly arched. centrally to escape the shaft. The groats or grain kernels are fed into the adjacent drums through feed openings 10 provided in' the stationary heads, there being chutes 11 and 12 leading to the openings from a feed pipe 13.

Interiorly the shell or cylinder of each drum is circumferentially corrugated as indicatedat 14c to provide similar channels 15 separated by V-shaped ribs 16. In the face of each channel I drill a plurality of equi andsuitably spaced holes 17, and after hav' ing drilled the holes I countersink or enlarge the inner end of each hole as indicated at 18. Theholes are of such a size that they will allow agroat or grain kernel to pass therethrough end on and the channels or countersinks co-act to efiectively line the jam screw isconsiderably lar er than the Width of the slot so that when tie screws are tightened up they hold the saddles in any ad'usted position. I

he heads 6 are also adjustably attached to the saddles, this being accomplished by providing the lugs of the heads with lengthwise extending slots 21, which receive jam screws 22 and 23 passing through the lugs and into the saddles. This latter adjustment permits the heads to be reset in respect to the drums when any adjustment ismade in the position of the saddles.

Each saddle supports a knife holder 24, there being a pair of holders for each drum. The holders are all similarly constructed and are semi-circular and concentric to the shaft 3 and are of such a radius that the cutting edges of the knives hereinafter described operate over the periphery of the drum. v

The ends of the knife holders butt the undersides of the saddles and they are detachably secured thereto by screw threaded studs 25 and 26 carried by the ends of the holders and passing through the saddles and provided at their upper ends with fastening nuts 27 and 28. The knife holders present 7 smooth faced rims 29 and each rim is pro- Ill vided with a centrally positioned, lengthwise extending, continuous T-shaped slot 30 which is utilized for a purpose later disclosed.

The pair of holders associated with each drum carries a plurality of similar knives 31, the knives being positioned parallel to the longitudinal axis of the drum and each knife having the ends thereof resting on the outer faces of the rims 29, and provided at each end with a bolt hole 32 adapted to receive an attaching bolt 33 fitted with a nut 34. The knives are fastened to the holders by first passing the bolts through the ends of each knife. and then applying the nuts, and then sliding the nuts into the T-shaped channels of the knife holders whilst passing the ends of the knives over the faces of the rims. Obviously the whol'e'set of knives can be slid into place one after the other in the manner described, and can be readily se cured in their correct final position by tight ening up the heads 35 of the bolts.

Each knife presents a sharpened cutting edge 36. which extends from the inner face of one knife holder to the inner face of the other, and the inner face 37, or that face next the drum is inclined so that such face is angularly positioned in respect to the drum face. The rear edge of the knife terminates in a heel 38.

When the knives are assembled on the knife holders the ends of the knives lie side by side on the holders and the cutting edge 36 of any one knife is directly opposite the heel 38 of the adjacent knife. According to this arrangement it will be apparent thatthe radial distance between the heel of any knife and the outer face of the drum controls the depth of cut of the groat or kernel passing through the drum perforation, and that the distance between the heel and the cutting edge of the adjacent knife controls the amount of clearance space given to the cut groat to escape from between the knives.

In order to make the above clear, I might explain that as a groat or kernel enters a drum perforation the outer end of that kernel will engage the inclined face 37 of a knife, and as the drum rotates will move endwise in the perforation under the combined action of gravity and centrifugal force, the said inclined face permitting of the end shifting of the kernel. As the kernel reaches the heel of the knife it is cut by the cutting edge of the following knife and thereafter that part of the kernel remaining in the perforation rides the inclinedface of the latter knife until it is cut by the following knife. This action continues until the complete ker nel is cut, and the number of cuts which any kernel is given depends entirely on the amount of inclination given the face '37. Obviously a greater inclination will produce a less number of cuts, and a lesser inclination will give more cuts per kernel.

In Figure 6 of the drawing I have shown in full and dotted outline a number of knives having different angular faces 37 of different pitch and from this View it will be readily seen how the amount of the pitch controls the length of cut of the kernel 39.

Obviously by providinga machine of this kind with a number of sets of knives and having the several sets presenting inclining faces 37 of different pitch, 1' can cut the groats or kernels fine or coarseas occasion may require bychoosing the proper set of knives for the particular work in hand. The distance between the heel of the'knife and the cutting edge of the adjacent knife requires to be as great as or greater than the distance between the heel of the knife and the drum to allow the cut groats to escape freely from between the knives.

WVhilst I have entered into a detailed description of the manner in which the knives are secured to the knife holders, it will be understood that I do not wish to constrict it to the precise construction shown, as any structure which would permit of the ready mounting or removal of the knives will suit my purpose provided the knives are securely held in working position. a

The knife holders with knives thereon can be bodily shifted endwise in respect to the drums by releasing the jam screws .20 and moving the pair of saddles on the frame and then subsequently tightening up the am screws. By so shifting the knives, I can present new sharp cutting edges to the drum perforations after those parts of the knives which have been previously in use have become dulled.

Any time the saddles or bridges are shifted as above explained, one will readjust the position of the heads of the drums, the adjustment being made by releasing the jam screws 22 and 23.

eratiug over the outer face thereof and have i 111;; the ends thereof secured to the runs of the holders andthe irinerfaces of the knives between the rims beveled. a V

- 2. In a great cutting machine, the combination with a cylindrical rotatably mounted perforated drum and a frame supporting the same, of knife holders carried and supported from theframe and located at the ends of the drum and presenting smooth faced rims concentric to the drum and similar knives extending lengthwise the drum and operatin'gon the outer face thereof and having the ends thereof secured to the faces of the rims and the inner faces thereof between the holders beveled to bring the heel and cutting edge of adjacent blades in spaced relationone to the other and with the heel blade.

of the bladefurther from the face of the drum than the cutting edge of the adjacent 3. In a groat cutting machine, the combinationwith a cylindrical rotatably mounted perforated drum and a frame supporting the same. of knife holders carried by and supported from the frame and located at the ends of the drumand presenting smooth faced rims concentric to the drum and having the rims provided with lengthwise exr tending T-shaped slots, snnllar knives extending lengthwise ofthe drum and operating! on the outer fztcethereof and having the ends thereof riding the outer faces of the rims and'the inner faces thereof between the rimsbeveled to bring the heel and cutting edges of adjacent blades in spaced relation one to the other and with the heel of the blade further from the face of the drum than the cutting edge of an adjacent blade and bolts entering the T-shaped slots and passing through the ends of the knives and fastening, the knivesto the rims.

v Sign d at Winnipeg this 5th day of March, 1926.

i a THEODORE 'KIPP, JR. 

